Adjustable piano-bench.



A. A. DUFF.

ADJUSTABLE PIANO' BENCH.

APPLIUATION rum) oo'r.s, 190e.

2 sums-SHEET 1.

Patented Apr. 27, 1909.

l vo A. A. DUH". ADJUSTABLE PIANO BENUH. APPLICATION FILED 00T. 9, 1908.

91 9 ,559, Patented Apr. 27, 1909.

UNITED ALBERT A. DVU FF, 0F MA N l STEE, M ICH l GA N.

ADJUSTABLE PIANO-BENCH.

Specification of Letters Patent.

Patented April 27, 1909.

Application led October 9, 1908. Serial No. 467,008,

To all whom it may concern:

Bo it known that I, ALBERT A. DUFF, a citizen of the United States,residing at Manistee, in the county of Manistee and State of Michigan,have invented certain new and useful Improvements in Adjustable Piano-Benches; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to piano benches, and particularly to that typeknown as duet enches..

The object of the invention is to provide an invention of this characterwhich will be ad- 'ustable vertically and angularly so that the eight ofthe bench may be regulated readily to accommodate. different players.

With these and other objects in view, the invention consists of certainnovel features of construction, combination and arrangement of parts, aswill be more fully described, andvparticularly pointed out in theappended claims.

In the accompanying drawings,.Figure 1 is a side elevation, Fig. 2 is anend elevation showing in dotted lines the tilted or angular adjustmentof the bench, Fig. 3 is a longitudinal section, Fig. 4 is a transversesection on the line 4-4 of Fig. 3, and Fig. 5 is a top plan view withparts broken away.

` Referring more especially to the drawings, 1 represents the base boardwhich is supported upon the four legs 2, extending downwardly fromeither corner thereof and being braced by the longitudinalstrut or rung3, which engages the transverse struts or rungs 4. The legs 2 haveseated in their upper ends the threaded sockets 5, which pass throughthe base board 1 so as to protect the latter and be open to receive theadjusting screws 6. Each adjusting screw passes upwardly from its socketconnection and its head 7 is formed spherical to engage the socket 8,carried upon the partition member 9, and form therewith a ball andsocket joint so that the partition member and its associated parts maybe freely adjustable. Surrounding the partition member 9 is a box orcasing 10, of the same area asthe base board 1. This casing 10 isprovided with a hinged cover 11, so as to close the same and cover thegearing to be hereinafter described.

Each screw 6 is provided adjacent its upper spherical head 7 with apinion or sprocket wheel 12 which is engaged by the single operatingchain 13, traveling entirely around the casing so as to engage all ofthe sprocket wheels upon the screws. In order to drive the chain andthereby operate the screws in either direction I journal in thepartition member 9 a stub shaft 14 having a squared upper end 15, toreceive the wrench 16, and having at its lower end a sprocket wheel 17for engagement with the chain, as shown. By turning the crank 16 it willbe readily seen that the screws 6 may be adjusted in their metallicsockets 5, so as to raise or lower the casing 10 and its seat or cover1]. The' partition member may be cut away, as shown in Fig. 5, so as tolighten the structure throughout, and it may be disposed so farbelowtheseat 11 that the handle 16 can be permanently secured to the stub shaft14. These features are, however, immaterial and need not be consideredas an im ortant part of the invention. To adjust t e device in angularrelation, as shown in dotted lines in Fig. 2 the screws are entirelyremoved from the other sockets, and the -forward ones started before therearward ones by holding the rear ones out of engagement with theirsockets until the angular condition of the seat appears to be correct.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extended exlanation.

Various changes in the orm, proportion and the minor details ofconstructlon may be resorted to without departing from the principle orsacrificing any of the advantages of this invention as defined in theappended claims.

Having thus described my invention, what I claim and desire to secure byLetters Patent isz- 1. In a device of the class described a table,threaded sleeves carried by the table, a

casing, bridge pieces carried in the casing,

adjustable screws revolubly mounted within sockets carried upon saidbridge pieces and adapted to engage the sleeves in the table, anoperating device carried by one of the bridge pieces within the casingfor adjusting all of said screws within the sockets simultaneously andahinged seat on the casing whereby said operating device may be covered.

2. In a device of the class described a table, threaded sleeves carriedby the table,l a

casing, bridge pieces mounted in the casing, erating said shaft and ahinged seat on the screws carried 1n sockets on the bridge pieces,casing to cover said lever. l and adapted to enga e the sleeves 1n theta- In testimony whereof l havehereunto set ble, sprockets on saiscrews, a chain for enmy hand in presence of two subscribing Wit- 5gaging all of said sprockets, a shaft journaled nesses.

1n one of the bridge pieces a pinion mounted v on said shaft and adaptedto engage said ALBERT DUFF chain so as to turn all of said screws withinWitnesses:

the sockets simultaneously, a folding lever CHARLES N. ELCHEB,

10 secured on the shaft within the casing for op- LILLIAN F. WH.I'11L.A

